Officers from the Metropolitan Crash Investigation Unit earlier made their way to the scene and will conduct a full investigation.

Clint Feuerherdt, the chief executive of Transit Systems, today confirmed in a statement that the incident occurred during a training exercise.

"It is with great sadness that I report one of our trainers was involved in an accident this morning while taking part in a routine training session in a vacant carpark," he said.

“His injuries were fatal and the driver has been taken to hospital... No passengers or members of the public were involved as it was a dedicated training session.

A 72-year-old man was hit by a bus in Botany yesterday. Picture: 9NEWS (9news)

“We are in a state of shock and grief and our sympathies are with the family of the trainer, who was much respected by his colleagues... We’ve just lost a member of our family and we are devastated by this incident.”